Colors（颜色）
显示原文
The color module handles all color-related functions like changing color depth, creating colors from hex code, converting between color depths, mixing colors, etc.
The type lv_color_t is used to store a color in RGB888 format.
This type and format is used in almost all APIs regardless to LV_COLOR_DEPTH.
颜色模块处理所有与颜色相关的功能，如改变颜色深度、从十六进制代码创建颜色、在颜色深度之间转换、混合颜色等。
类型 lv_color_t 用于以RGB888格式存储颜色。无论 LV_COLOR_DEPTH 如何，几乎所有 API 中都使用此类型和格式。
Creating colors（创造色彩）
RGB（三原色）
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Create colors from Red, Green and Blue channel values:
从红色、绿色和蓝色通道值创建颜色
/*All channels are 0-255*/
lv_color_t c = lv_color_make(red, green, blue);
/*Same but can be used for const initialization too */
lv_color_t c = LV_COLOR_MAKE(red, green, blue);
/*From hex code 0x000000..0xFFFFFF interpreted as RED + GREEN + BLUE*/
lv_color_t c = lv_color_hex(0x123456);
/*From 3 digits. Same as lv_color_hex(0x112233)*/
lv_color_t c = lv_color_hex3(0x123);
HSV（色调饱和值-Hue Saturation Value）
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Create colors from Hue, Saturation and Value values:
根据色相、饱和度和值创建颜色
//h = 0..359, s = 0..100, v = 0..100
lv_color_t c = lv_color_hsv_to_rgb(h, s, v);
//All channels are 0-255
lv_color_hsv_t c_hsv = lv_color_rgb_to_hsv(r, g, b);
//From lv_color_t variable
lv_color_hsv_t c_hsv = lv_color_to_hsv(color);
Palette（调色板）
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LVGL includes Material Design's palette of colors. In this system all named colors have a nominal main color as well as four darker and five lighter variants.
The names of the colors are as follows:
LV_PALETTE_REDLV_PALETTE_PINKLV_PALETTE_PURPLELV_PALETTE_DEEP_PURPLELV_PALETTE_INDIGOLV_PALETTE_BLUELV_PALETTE_LIGHT_BLUELV_PALETTE_CYANLV_PALETTE_TEALLV_PALETTE_GREENLV_PALETTE_LIGHT_GREENLV_PALETTE_LIMELV_PALETTE_YELLOWLV_PALETTE_AMBERLV_PALETTE_ORANGELV_PALETTE_DEEP_ORANGELV_PALETTE_BROWNLV_PALETTE_BLUE_GREYLV_PALETTE_GREY
To get the main color use
lv_color_t c = lv_palette_main(LV_PALETTE_...).
For the lighter variants of a palette color use
lv_color_t c = lv_palette_lighten(LV_PALETTE_..., v). v can be
1..5. For the darker variants of a palette color use
lv_color_t c = lv_palette_darken(LV_PALETTE_..., v). v can be
1..4.
LVGL中包含 Material Design's palette 的颜色。在这个系统中，所有命名的颜色都有一个名义上的主要颜色，以及四种较暗和五种较浅的变体。
颜色的名称如下：
LV_PALETTE_REDLV_PALETTE_PINKLV_PALETTE_PURPLELV_PALETTE_DEEP_PURPLELV_PALETTE_INDIGOLV_PALETTE_BLUELV_PALETTE_LIGHT_BLUELV_PALETTE_CYANLV_PALETTE_TEALLV_PALETTE_GREENLV_PALETTE_LIGHT_GREENLV_PALETTE_LIMELV_PALETTE_YELLOWLV_PALETTE_AMBERLV_PALETTE_ORANGELV_PALETTE_DEEP_ORANGELV_PALETTE_BROWNLV_PALETTE_BLUE_GREYLV_PALETTE_GREY
要获取主要颜色，请使用
lv_color_t c = lv_palette_main(LV_PALETTE_...).
要获得调整亮度后的调色板颜色，请使用 lv_color_t c = lv_palette_lighten(LV_PALETTE_..., v). v 可以是1到5。
要获得调整深度后的调色板颜色，请使用 lv_color_t c = lv_palette_darken(LV_PALETTE_..., v). v 可以是1到4。
Modify and mix colors（修改和混合颜色）
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The following functions can modify a color:
以下函数可以修改颜色：
// Lighten a color. 0: no change, 255: white
lv_color_t c = lv_color_lighten(c, lvl);
// Darken a color. 0: no change, 255: black
lv_color_t c = lv_color_darken(lv_color_t c, lv_opa_t lvl);
// Lighten or darken a color. 0: black, 128: no change 255: white
lv_color_t c = lv_color_change_lightness(lv_color_t c, lv_opa_t lvl);
// Mix two colors with a given ratio 0: full c2, 255: full c1, 128: half c1 and half c2
lv_color_t c = lv_color_mix(c1, c2, ratio);
Built-in colors（内置颜色）
显示原文
lv_color_white() and lv_color_black() return 0xFFFFFF and
0x000000 respectively.
lv_color_white() 和 lv_color_black() 分别返回 0xFFFFFF 和 0x000000。
Opacity（不透明度）
显示原文
To describe opacity the lv_opa_t type is created from uint8_t.
Some special purpose defines are also introduced:
LV_OPA_TRANSPValue: 0, means no opacity making the color completely transparentLV_OPA_10Value: 25, means the color covers only a littleLV_OPA_20 ... OPA_80follow logicallyLV_OPA_90Value: 229, means the color near completely coversLV_OPA_COVERValue: 255, means the color completely covers (full opacity)
You can also use the LV_OPA_* defines in lv_color_mix() as a
mixing ratio.
描述不透明度时，创建了 lv_opa_t 类型，该类型由 uint8_t 创建。
还引入了一些特殊目的的定义：
LV_OPA_TRANSP值为0，表示完全透明，使颜色完全透明LV_OPA_10值为25，表示颜色仅覆盖一小部分LV_OPA_20 ... OPA_80遵循逻辑LV_OPA_90值为229，表示颜色几乎完全覆盖LV_OPA_COVER值为255，表示颜色完全覆盖（完全不透明）
您还可以在 lv_color_mix() 中使用 LV_OPA_* 定义作为混合的 比例。